This isn't fair, my PC is keep switching itself off. It juststarted today mind I think I've figured out its my PSU isn't outputting enough power . The last PSU this machine went though developed a fault with switching on. I then put my spare one in which I think was a 350W (not totally sure bout that though). I figured its my PSU becuase the last time it happened I got a message off my Graphics card saying it wasn't getting enough power and was going into the lower power mode, this is meant to happen if you forget to plug in the aditional molex connector.

Anyway does anyone have any suggestions for where to geta new PSU from? Or maybe what power I should be looking for? I'm not sure how to calculate it .

Thanx